DeepSeek-V4-Flash vs GPT-6 Astra
Wins 0 of 7 areas
—
Wins 7 of 7 areas
Coding · Agents · Reasoning · Facts · Math · Long documents · Following instructions
GPT-6 Astra is the stronger all-rounder.DeepSeek-V4-Flash is cheaper.
Scores updated · 35 tests both models report · How we compare
Where each one wins
Tests won in each of the seven areas where both have results. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.
- ReasoningHard problems that need careful thinking06GPT-6 Astra6 of 6 tests
- CodingWriting and fixing software05GPT-6 Astra5 of 5 tests
- AgentsCarrying out multi-step tasks on its own05GPT-6 Astra5 of 5 tests
- FactsGetting facts right instead of making them up03GPT-6 Astra3 of 3 tests
- MathCompetition and research-level math03GPT-6 Astra3 of 3 tests
- Long documentsFinding answers in very long texts01GPT-6 Astra1 of 1 test
- Following instructionsDoing exactly what it is asked01GPT-6 Astra1 of 1 test
Long documents and following instructions rest on a single test each.
What it costs
Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.
DeepSeek-V4-Flash costs 99% less for the same work.
The biggest differences
The tests each model wins by the widest margin, up to three each. Scores are out of 100.
Where GPT-6 Astra pulls ahead
- Extremely hard research-level math problemsFrontierMath Tier 4+73.2points ahead
- Complex command-line tasks across many fieldsTerminal-Bench 4.0+47points ahead
- Short factual questions, answered correctlySimpleQA Verified+41.5points ahead
Where DeepSeek-V4-Flash pulls ahead
No clear win on a test scored out of 100.
Every test, side by side
All 35 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGPT-6 Astra
- LMArena · WebDevGPT-6 Astra by 343 rating points14311774+343 rating
- LiveBench · Agentic CodingGPT-6 Astra by 10.546.857.3+10.5
- Terminal-Bench 2.1GPT-6 Astra by 9.778.788.4+9.7
- SciCodeGPT-6 Astra by 6.250.356.5+6.2
- LiveBench · CodingGPT-6 Astra by 5.47580.4+5.4
AgentsGPT-6 Astra
- Terminal-Bench 4.0GPT-6 Astra by 4712.159.1+47
- BrowseCompGPT-6 Astra by 18.373.291.5+18.3
- AA IT-Bench SREGPT-6 Astra by 17.131.548.6+17.1
- GDPValGPT-6 Astra by 6.946.753.6+6.9
- τ-Bench V3 · BankingGPT-6 Astra by 239.441.4+2
ReasoningGPT-6 Astra
- SimpleBenchGPT-6 Astra by 37.346.383.6+37.3
- ARC-AGI-2GPT-6 Astra by 33.661.495+33.6
- Humanity's Last ExamGPT-6 Astra by 16.138.654.7+16.1
- CritPtGPT-6 Astra by 15.116.631.7+15.1
- LiveBench · ReasoningGPT-6 Astra by 6.186.692.7+6.1
- GPQA DiamondGPT-6 Astra by 5.390.896.1+5.3
FactsGPT-6 Astra
- SimpleQA VerifiedGPT-6 Astra by 41.534.175.6+41.5
- AA-Omniscience · Non-hallucinationGPT-6 Astra by 40.48.348.7+40.4
- AA-Omniscience · AccuracyGPT-6 Astra by 22.240.462.6+22.2
MathGPT-6 Astra
- FrontierMath Tier 4GPT-6 Astra by 73.224.497.6+73.2
- FrontierMath Tiers 1-3 (v2)GPT-6 Astra by 36.257.593.7+36.2
- LiveBench · MathematicsGPT-6 Astra by 1086.896.8+10
Following instructionsGPT-6 Astra
- LiveBench · Instruction FollowingGPT-6 Astra by 10.165.575.6+10.1
Other results11 tests, not counted
Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.
- AA-OmniscienceGPT-6 Astra by 57.7-14.343.4+57.7
- Agents' Last ExamGPT-6 Astra by 34.125.259.3+34.1
- DeepSWE 1.1GPT-6 Astra by 19.754.474.1+19.7
- AA IntelligenceGPT-6 Astra by 18.434.352.7+18.4
- HiL-Bench (Tools-allowed)GPT-6 Astra by 17.547.865.3+17.5
- HLE (with tools)GPT-6 Astra by 12.145.157.2+12.1
- livebench_languageGPT-6 Astra by 10.279.289.4+10.2
- AA Agentic IndexGPT-6 Astra by 9.841.751.5+9.8
- ARC-AGI-1GPT-6 Astra by 8.58997.5+8.5
- Artificial Analysis Coding IndexGPT-6 Astra by 7.869.176.9+7.8
- livebench_data_analysisGPT-6 Astra by 3.779.383+3.7
Questions people ask
Which is better, DeepSeek-V4-Flash or GPT-6 Astra?
GPT-6 Astra wins all seven areas where both have results: coding, agents, reasoning, facts, math, long documents and following instructions. DeepSeek-V4-Flash wins none, but costs 99% less.
Which is better for coding?
GPT-6 Astra. It wins 5 of the 5 coding tests both models report; DeepSeek-V4-Flash wins none.
Which is cheaper?
DeepSeek-V4-Flash costs $0.14 per million input tokens and $0.28 per million output tokens; GPT-6 Astra costs $10.00 and $50.00. That makes DeepSeek-V4-Flash about 99% cheaper for the same work.
How do you compare the two?
We use the 35 benchmark tests both models have published scores on. The verdict counts the 24 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 11 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.